نتایج جستجو برای: drought monitoring

تعداد نتایج: 328710  

Journal: :Bulletin of the American Meteorological Society 2021

Drought monitoring is one of the key factors in drought risk management and the use of drought indices such as the standardized precipitation index (SPI) is a useful tool in this regard. The aim of this study is to evaluate and zone drought risk in different years and return periods in Karkheh basin. For this purpose, Standardized Precipitation Index (SPI) as a selected index was used to assess...

Journal: :Journal of environmental management 2013
Fengsong Pei Xia Li Xiaoping Liu Chunhua Lao

Frequency and severity of droughts were projected to increase in many regions. However, their effects of temporal dynamics on the terrestrial carbon cycle remain uncertain, and hence deserve further investigation. In this paper, the droughts that occurred in China during 2001-2010 were identified by using the standardized precipitation index (SPI). Standardized anomaly index (SAI), which has be...

2010
SERGIO M. VICENTE-SERRANO SANTIAGO BEGUERÍA JUAN I. LÓPEZ-MORENO

The authors propose a new climatic drought index: the standardized precipitation evapotranspiration index (SPEI). The SPEI is based on precipitation and temperature data, and it has the advantage of combining multiscalar character with the capacity to include the effects of temperature variability on drought assessment. The procedure to calculate the index is detailed and involves a climatic wa...

2003
Andrew D. Richardson Melissa Aikens Graeme P. Berlyn Philip Marshall

We conducted a progressive-drought greenhouse experiment, using potted paper birch (Betula papyrifera) seedlings in their third year of growth, to investigate whether a commercially available organic biostimulant improved plant health and stress tolerance, and to compare four noninvasive, instrumentbased methods for monitoring plant stress. In the well-watered (no drought) plants, the biostimul...

2010

Frequent monitoring of stress levels in turfgrass is key to maintaining healthy turfgrass stands. Current methods used to monitor turfgrass for drought and salinity stress can be time consuming and expensive. This study was conducted to determine if data obtained from digital image analysis and spectroradiometry could accurately detect drought and salinity stress in hybrid bluegrass. Furthermor...

Journal: :Journal of Agrometeorology 2021


 Drought is a natural disaster due to less precipitation than the normal that can occur irrespective of climate regimes. Impact assessment drought and monitoring are most important mitigation stratregies combat effects. As single index cannot assess all conditions, in present study multi-variate indices approach has been used monitor drought. Five were assessed using data such as deciles ...

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